Nepean Bay Weather Forecast

    • 6
    • 23

    Mostly clear

    • 15
    • 26

    Shower or two

    • 10
    • 18

    Showers

    • 10
    • 22

    Showers. Storm developing

    • 11
    • 19

    Shower or two. Wind easing

    • 7
    • 18

    Cloudy

    • 7
    • 19

    Possible shower

Today 18 Oct Kangaroo Island

Mostly clear. Winds northerly 20 to 30 km/h.

Investigator Strait Coastal Waters

Wind
Northeasterly 10 to 15 knots turning northerly in the late evening. Winds reaching up to 20 knots through the Backstairs Passage in the late evening.
Seas
Below 1 metre.
1st Swell
West to southwesterly around 1 metre.
Weather
Mostly clear.
Weather Situation
A weakening ridge over the eastern waters will be cleared by a trough pushing in from the west early Sunday. This trough and an embedded low will move inland with another low pressure system moving into the Bight by Tuesday. A series of troughs and a cold front will move over coastal waters with the passing of this low through the mid week before a ridge extends over waters late by Wednesday.
Graph Plots Open in Graphs

  • Temperature Forecast Bureau of Meteorology

  • Temperature Real-Time

Nepean Bay Temperature Statistics View More

October Temperature

Kingscote Airport (7km)

  • Lowest 15 October, 2025

    1.6 °C

  • Average October

    14 °C

  • Highest 16 October, 2025

    27.6 °C

Climate (2020–Present)

Kingscote Airport (7km)

Take a look at our website widgetsAvailable free! Find Out More

  • Average Low 2020–2025

    9.2 °C

  • Average 2020–2025

    14.7 °C

  • Average High 2020–2025

    21.1 °C
Get WillyWeather+ to remove ads